her·o·in

[her-oh-in]
noun Pharmacology.
a white, crystalline, narcotic powder, C 21 H 23 NO 5 , derived from morphine, formerly used as an analgesic and sedative: manufacture and importation of heroin are now controlled by federal law in the U.S. because of the danger of addiction.


Origin:
1895–1900; formerly trademark; < German Heroin < Greek hērō-, stem of hḗrōs hero + German -in -in2; allegedly so called from the feelings of power and euphoria which it stimulates

heroin, heroine.
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00:10
Heroin is always a great word to know.
So is bezoar. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
heroin (ˈhɛrəʊɪn) [Click for IPA pronunciation guide]
 
n
diamorphine, Technical names: diacetylmorphine a white odourless bitter-tasting crystalline powder related to morphine: a highly addictive narcotic. Formula: C21H23NO5
 
[C19: coined in German as a trademark, probably from hero, referring to its aggrandizing effect on the personality]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

heroin
from Ger. Heroin, coined 1898 as trademark registered by Friedrich Bayer & Co. for their morphine substitute, traditionally from Gk. heros (see hero) because of the euphoric feeling the drug provides.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

heroin her·o·in (hěr'ō-ĭn)
n.
A white, bitter, crystalline compound that is derived from morphine and is a highly addictive narcotic. Also called diacetylmorphine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
heroin   (hěr'ō-ĭn)  Pronunciation Key 
A white, odorless, bitter crystalline compound, C17H17NO(C2H3O2)2, that is derived from morphine and is a highly addictive narcotic.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The idea is similar to the way in which an overdose of heroin or morphine is
  treated.
Most opium, which is derived from poppies, is converted into heroin.
Today's three main illegal drugs are marijuana, cocaine and heroin.
Too engulfed in consuming cocaine, heroin and other drugs.
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